libunwind should be found in default location about extrae HOT 2 OPEN

On some machines where the installation is /usr/lib/{target_triplet}/ for libs, /usr/include/{target_triplet}/ for includes, etc, this solution is not event possible as --with-{name}-bins, --with-{name}-includes and --with-{name}-libs are not necessarily defined.

The configure script needs to be able to pick-up installation.
Maybe, check if the paths are given directly, and if not, check whether the header and shared libraries are available picked-up from the system, if not, test if it's available with information from pkg-config.

So far, I can see the issue arising at least with libunwind, dyndist, and dwarf. I have nto been able to go further in the building process yet.

from extrae.

After fighting with the configure for days, it seems they are using some macro to do tests.

For future reference, or for anyone having the same issues, it is possible to get around the issue by providing --with-unwind=<any_existing_dir> --with-unwind-binarires=<any_existing_dir> --with-unwind-headers=<path_to_headers> --with-unwind-libs=<path_to_libs>.

from extrae.